[emitDecoratorMetadata] TypeError: Cannot read property 'kind' of undefined

[jmlopez-rod]

The following code crashes the compiler:

// File tmp.ts
class Injectable {

 constructor(...args: any[]) {
 console.log('args:', args);
 }

 static inject(clazz: any, injectables: string[]): void {
 console.log('clazz:', clazz, 'injectables:', injectables);
 }

}


function Inject(args: string[]): Function {
 return (target: any) => {
 Injectable.inject(target, args);
 };
}



@Inject(['a', 'b'])
class A extends Injectable {

 constructor(...injectables) {
 super(...injectables);
 }

}

// Without the decorator
// Injectable.inject(A, ['a', 'b']);

export default A;

Results:

jmlopez in ~/testing$ tsc -v
Version 1.8.10
jmlopez in ~/testing$ tsc tmp.ts --experimentalDecorators --emitDecoratorMetadata
/Users/jmlopez/testing/node_modules/typescript/lib/tsc.js:33078
 throw e;
 ^

TypeError: Cannot read property 'kind' of undefined
 at emitSerializedParameterTypesOfNode (/Users/jmlopez/testing/node_modules/typescript/lib/tsc.js:30799:54)
 at emitSerializedTypeMetadata (/Users/jmlopez/testing/node_modules/typescript/lib/tsc.js:30844:25)
 at emitDecoratorsOfConstructor (/Users/jmlopez/testing/node_modules/typescript/lib/tsc.js:30537:17)
 at emitDecoratorsOfClass (/Users/jmlopez/testing/node_modules/typescript/lib/tsc.js:30514:17)
 at emitClassLikeDeclarationBelowES6 (/Users/jmlopez/testing/node_modules/typescript/lib/tsc.js:30474:17)
 at emitClassLikeDeclaration (/Users/jmlopez/testing/node_modules/typescript/lib/tsc.js:30323:21)
 at emitClassDeclaration (/Users/jmlopez/testing/node_modules/typescript/lib/tsc.js:30319:24)
 at emitJavaScriptWorker (/Users/jmlopez/testing/node_modules/typescript/lib/tsc.js:32383:32)
 at emitNodeWithoutSourceMap (/Users/jmlopez/testing/node_modules/typescript/lib/tsc.js:32189:21)
 at emitNodeWithSourceMap (/Users/jmlopez/testing/node_modules/typescript/lib/tsc.js:32183:21)

It works fine without the --emitDecoratorMetadata. I have also tested in Version 1.9.0-dev.20160217 and I obtain the same error.

[mhegazy]

Andy (Andrewkraft) (@Andy-MS) can you take a look.

[jmlopez-rod]

Here is a more compact example that makes the compiler crash

function inject(clazz: any, injectables: (string | any)[]): void {
 console.log('here...');
}


function Inject(args: string[]): Function {
 return (target: any) => {
 inject(target, args);
 };
}


@Inject(['a', 'b'])
class A {

 constructor(...args) {
 inject(this, args);
 }

}

export default A;

Again, this happens only when using the --emitDecoratorMetadata flag. Another way to fix this is to add the type to args, that is, if we declare the class like this:

@Inject(['a', 'b'])
class A {

 constructor(...args: any[]) {
 inject(this, args);
 }

}